package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import org.apache.ibatis.annotations.Param;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

@Service
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    //   新增菜品和对应口味
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);
//        向菜品插入一条数据
        dishMapper.insert(dish);
//        获取insert操作生成的组件值
        Long dishId =dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertbatch(flavors);
        }

    }
//    菜品查询

    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page = dishMapper.pageQuery(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }


@Transactional
    //菜品批量删除
    public void deletebatch(List<Long> ids) {
//判断当前菜品是否能够删除---是否存在起售中的菜品?
        for (Long id : ids) {
            Dish dish = dishMapper.getById(id);
            if(dish.getStatus() == StatusConstant.ENABLE) {
//判断当前菜品是否在售，起售则不能删除
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }


            // 判断当前菜品是否能够删除---是否被套餐关联了??


        }
        List<Long> setmealIds = setmealDishMapper.getDishIdsBySetmealIds(ids);
        if (setmealIds != null && setmealIds.size() > 0) {
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
//        // 鹏除菜品表中的菜品数据
//        for (Long id : ids) {
//            dishMapper.deleteById(id);
//            //删除菜品关联的口味数据
//            dishFlavorMapper.deletedishById(id);
//        }
//根据菜品集合批量删除菜品数据
    dishMapper.deleteByIds(ids);
        //根据菜品集批量删除关联口味数据
    dishFlavorMapper.deletedishByIds(ids);
    }
//更具菜品id查询对应菜品以及关联口味数据
    public DishVO getByIdWithFlavor(Long id) {
//    根据菜品id获取数据
        Dish dish = dishMapper.getById(id);
        List<DishFlavor> dishFlavors = dishFlavorMapper.getBydishId(id);
        //将查询到的数据封装给VO对象
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);
        return dishVO;

    }
    //根据菜品id信息修改对应菜品数据以及口味
    public void updateWithFlavor(DishDTO dishDTO) {
  Dish dish = new Dish();
  BeanUtils.copyProperties(dishDTO, dish);
  //修改菜品基本信息
  dishMapper.update(dish);
  //删除原有口味数据
        dishFlavorMapper.deletedishById(dishDTO.getId());
        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertbatch(flavors);
        }
    }

    public List<Dish> list(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

}